package com.atguigu.springcloud.controller;

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.atguigu.springcloud.common.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import com.atguigu.springcloud.service.PaymentService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

/**
 * @author : leimingchao
 * @date Date : 2022年02月15日 21:05
 */
@RestController
@Slf4j
public class CircleBreakerController {

    public static final String SERVICE_URL = "http://nacos-payment-provider";

    @Autowired
    private RestTemplate restTemplate;

    @GetMapping(value = "/consumer/fallback/{id}")
    // @SentinelResource(value = "fallback")
    //fallback只负责java业务异常
    // @SentinelResource(value = "fallback", fallback = "handlerFallback")
    //blockHandler只负责sentinel控制台配置违规
    // @SentinelResource(value = "fallback", blockHandler = "blockHandler")
    @SentinelResource(value = "fallback",
            fallback = "handlerFallback",
            blockHandler = "blockHandler",
            exceptionsToIgnore = {IllegalArgumentException.class})
    public CommonResult<Payment> fallback(@PathVariable(value = "id") Long id) {
        CommonResult<Payment> result = restTemplate.getForObject(SERVICE_URL + "/paymentSQL/" + id, CommonResult.class, id);

        if (id == 4) {
            throw new IllegalArgumentException("IllegalArgumentException，非法参数异常");
        } else if (result.getData() == null) {
            throw new NullPointerException("NullPointerException,该ID没有对应记录，空指针异常");
        }
        return result;
    }

    /**
     * 本例是fallback
     * @param id
     * @param e
     * @return
     */
    public CommonResult handlerFallback(@PathVariable(value = "id") Long id, Throwable e) {
        Payment payment = new Payment(id, null);
        return new CommonResult<>(444, "兜底异常handlerFallback，exception内容" + e.getMessage(), payment);
    }

    /**
     * 本例是blockHandler
     * @param id
     * @param blockException
     * @return
     */
    public CommonResult blockHandler(@PathVariable(value = "id") Long id, BlockException blockException) {
        Payment payment = new Payment(id, null);
        return new CommonResult<>(445, "blockHandler-sentinel限流，无此流水：blockException " + blockException.getMessage(), payment);
    }

    //OpenFeign

    @Autowired
    private PaymentService paymentService;

    @GetMapping(value = "/consumer/paymentSQL/{id}")
    public CommonResult<Payment> paymentSQL(@PathVariable(value = "id") Long id) {
        return paymentService.paymentSQL(id);
    }
}
